0.04x+0.03(20000-x)=680

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Solution for 0.04x+0.03(20000-x)=680 equation: 



0.04x+0.03(20000-x)=680

We move all terms to the left:

0.04x+0.03(20000-x)-(680)=0

We add all the numbers together, and all the variables

0.04x+0.03(-1x+20000)-680=0

We multiply parentheses

0.04x-0.03x+600-680=0

We add all the numbers together, and all the variables

0.01x-80=0

We move all terms containing x to the left, all other terms to the right

0.01x=80

x=80/0.01

x=8000

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